Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 553 · 40 questions

What you do (Pull down, lift up): 1. Push the pencil through the thread reel; an adult holds the pencil ends level. 2. Tie the paper cup to one end of the string and lay the string over the reel. 3. Put coins in the cup and pull the other end down. 4. Feel how hard you pull; never stand under the load or wrap string round your fingers.

1. 1.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
2. 2.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same string (b) the same cup of coins (c) number of pulleys (d) the lifting height
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a battery cell (d) a small paper cup
6. 6.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a pencil (d) a magnet
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) a battery cell (d) a mirror
10. 10.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
11. 11.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
12. 12.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) yeast (d) string
15. 15.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
16. 16.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a battery cell (c) string (d) an empty thread reel
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) turmeric powder
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
22. 22.True or false: a steering wheel is a lever. (a) False (b) True
23. 23.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
24. 24.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
25. 25.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a slide (c) a spoon lifting a lid (d) a doorknob
26. 26.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) yeast (d) a pencil
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a pencil (d) a magnet
31. 31.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
32. 32.True or false: string is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
34. 34.⚙️ Which of these is a lever? (a) a ramp (b) a flagpole (c) a see-saw (d) a well pulley
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
36. 36.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a tap handle (c) a crowbar (d) a flagpole
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
38. 38.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crowbar (c) a see-saw (d) a spoon lifting a lid
39. 39.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
40. 40.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids